In Marvel Comics, Riri Williams was a genius 15 year old who studied at M.I.T. She created her own version of Tony Stark's Iron Man suit using material stolen from the school. While testing the suit, she stopped some prisoners trying to escape.
Some sites claim that Riri is an Indonesian name, but I don't see much backing that claim up. Riri is a nickname used by the pop star Rhianna. Riri does not appear in the Social Security Administration's name database.